#include "mpi.h"
#include <stdio.h>

int main(int argc,char *argv[] )
{
   int rank, size;
   char hostname[MPI_MAX_PROCESSOR_NAME];
   int resultlen;
   MPI_Init( &argc, &argv );
   MPI_Comm_rank( MPI_COMM_WORLD, &rank );
   MPI_Comm_size( MPI_COMM_WORLD, &size );
   MPI_Get_processor_name(hostname,&resultlen);
   printf( "Hello! I'm %d of %d running on %s\n",
            rank, size, hostname );
   MPI_Barrier(MPI_COMM_WORLD);
   MPI_Finalize();
   return 0;
}


